4 sentences

1. 从事广告工作并非易事。

   cóng​shì guǎng​gào gōng​zuò bìng​fēi yì​shì.

   Working in advertising is not easy.

   Source: CCMatrix

2. 保守秘密并非易事。

   bǎo​shǒu mì​mì bìng​fēi yì​shì.

   Keeping secrets isn't easy.

   Source: CCMatrix

3. 要满足每一个人绝非易事。

   yào mǎn​zú měi yí​ge​rén jué​fēi yì​shì.

   It is by no means easy to satisfy everyone.

   Source: UM-Corpus: Spoken

4. 对许多人来说，戒烟并非易事。

   duì xǔ​duō rén lái​shuō, jiè yān bìng​fēi yì​shì.

   For many people, it is not easy to quit smoking.

   Source: CCMatrix